Deploy an object and use the manipulator to retrieve it and bring it to the surface. Even though we show it in this image, We don't recommend you use your car keys or anything else you don't want to lose, especially if working in open water and not in a pool. Use the manipulator extension angle, ROV pitch control and manipulator rotation to optimize the orientation of the manipulator for grasping your object. Once you have grasped the object, press the manipulator close button a few times to tighten the grip. Bring the object to the surface to recover it. As usual, repeat this several times.

Here are some manipulator / recovery tips:

• While trying to grasp a small movable objects, try not thrust backwards quickly - the thrust may push the object and it could end up somewhere where it is harder to grasp. Practicing with a golf ball is a great skill builder since the golf ball will tend to roll away while trying to grasp it. At least you have more potential for success than a cat trying to catch a laser dot.
• Water is much denser than air. Once you have grabbed an object, do not try to make quick or sudden maneuvers. When you turn fast or fly fast, the drag force may dislodge the object.

• When you reach the surface, use a net under the ROV and coordinate your release with the person grabbing the object, so you don't lose it to the depths again.
• If you lift the ROV out of the water with the object in the manipulator, remember the object is probably much heaver in air and may slip out of the jaws.
• If you can get a secure grip, such as through a loop in the object, the better. Some people have modified the jaws to include sharp pointed screws to also ensure a more secure grasp.